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How has the amount of carbon dioxide in the atmosphere changed over the past 500 years?

A. No change

B. Linear increase

C. Linear decrease

D. Exponential increase

E. Exponential decrease



bold = correct answer

Question Identifier: GCI_2011_027
Designed for: Non-Science Majors, General Public
Primary Author(s): none
Contributing Author(s): K. Huang, D. Poulson, J. Libarkin, D. Sibley
Misconception's Reference: Item modified from item published in the Greenhouse Effect Concept Inventory (Keller, 2006)
Notes: Stem changed to remove "Which description best represents your understanding of" at beginning of question- libarkin libarkin Dec 2, 2011


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